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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#440009#8339. Rooted Treeucup-team1074#AC ✓1151ms6944kbC++231.4kb2024-06-12 22:52:572024-06-12 22:52:58

Judging History

你现在查看的是最新测评结果

  • [2024-06-12 22:52:58]
  • 评测
  • 测评结果:AC
  • 用时:1151ms
  • 内存:6944kb
  • [2024-06-12 22:52:57]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define LL long long
#define pb push_back
#define x first
#define y second 
#define endl '\n'
const LL maxn = 4e05+7;
const LL N = 5e05+10;
const LL mod = 1e09+9;
const int inf = 0x3f3f3f3f;
const LL llinf = 5e18;
#define int long long
typedef pair<int,int>pl;
priority_queue<LL , vector<LL>, greater<LL> >mi;//小根堆
priority_queue<LL> ma;//大根堆
LL gcd(LL a, LL b){
	return b > 0 ? gcd(b , a % b) : a;
}

LL lcm(LL a , LL b){
	return a / gcd(a , b) * b;
}
int n , m;
vector<int>a(N , 0);
void init(int n){
	for(int i = 0 ; i <= n ; i ++){
		a[i] = 0;
	}
}
LL qpow(LL a , LL b)//快速幂
{
	LL sum=1;
	while(b){
		if(b&1){
			sum=sum*a%mod;
		}
		a=a*a%mod;
		b>>=1;
	}
	return sum;
}
void solve() 
{
	int m , k;
	int pre = 0;
	int tot = 1;
	cin >> m >> k;
	int ans = 0;
	for(int i = 0 ; i < k ; i ++){
		int d = qpow(tot , mod - 2);
		int choi = pre * d;
		choi %= mod;
		ans += choi;
		ans %= mod;
		int add = m * (choi + (tot *d % mod));
		add %= mod;
		pre -= choi;
		pre += add;
		pre += mod * 4;
		pre %= mod;
		tot += m - 1;
		tot %= mod;
	}
	cout << (ans + pre) % mod;
}            
signed main() 
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cout.precision(10);
    int t=1;
	//cin>>t;
    while(t--)
    {
    	solve();
    }
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 6868kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 2ms
memory: 6784kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 73ms
memory: 6820kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 775ms
memory: 6920kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 6808kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 835ms
memory: 6780kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 474ms
memory: 6944kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1140ms
memory: 6848kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 210ms
memory: 6888kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 625ms
memory: 6908kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 368ms
memory: 6900kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 334ms
memory: 6792kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 994ms
memory: 6792kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1150ms
memory: 6848kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1151ms
memory: 6876kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1150ms
memory: 6916kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed